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  1. #1

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    Thumbs up Integrated amplifier.

    Hello fellas! this is my new integrated amplifier. I finished this morning at 4:30. Very happy with sound.it is quiet as a mouse no noise at all even at turn on or off. the offset is 1.7mv left channel and 1.8mv right channel.

  2. #2

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    Man that looks pretty. What wattage you looking at?
    Advice is free, the Flea Market is earned - F1Nut

    Lessons cost money, good ones cost LOTS - Tony Beets

    HT: APC H15 | Pio 51FD | Uverse | Xbox 360 | Squeezebox Classic | Integra DTR 5.9 | Carver AV-705x & M1.0t MKII Opt002 | LSi 15 | LSiC | LSi F/x | Kimber Hero IC & 8VS SC

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  3. #3

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    Thanks, it is 130 watts RMS. I spent in parts around $500.


    This is some specifications:

    Audiophile Mosfet, Dual symmetrical differential power amplifier

    Direct Signal Purist Concept. it uses 2 pairs 2SK1058/J162
    per channel produced by Renesas designed specifically for audio
    application. Unlike conventional amplifier, it only require 2 stage
    signal amplification to drive these mosfets, hence very natural sounding.
    You can feel the drum sticks hitting the cymbals and the piano hammer
    hitting the strings'


    130watts RMS 8ohms
    250watts RMS 4ohms
    THD : 0.008% (20 Hz : 20 kHz, 8 ohms)
    Frequency Response 4 Hz - 100 kHz
    Damping Factor (20-20K Hz, 8 ohms) : 500
    Signal to Noise Ratio : 120 dB 'A' weighted
    Input Impedance/Sensitivity : 33K / 1V

    Total dead silent at idle, absolutely no hiss or hum at full ear contact with tweeter and woofer at gain of 40X (32dB)
    and an input Sensitivity of 1V for rated output of 130watts RMS 8ohms


    Complete silence, No thump or noise during turn on/off . (No relay, Direct output)

    it has two pairs of balanced input differential..This will ensure accurate imaging of every instrument
    and vocals at complex and high energy passages.


    Very high quality double sided PCB, gold plated solder pads. ISO certified
    Output devices : genuine 2 pairs Renesas 2SK1058/J162
    Low noise and low capacitance audio drivers/transistors throughout
    Low ESR capacitors
    High Quality sealed variable resistors
    low noise audio resistors
    Last edited by lanchile; 11-12-2011 at 03:08 PM.

  4. #4

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    That is VERY slick

  5. #5

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    Quote Originally Posted by Drenis View Post
    That is VERY slick
    Yeah!!! I always wanted to build a good amp, but slick. This is my first time I build a slick amp all the others were standar size. it is slick but very heavy lol. 12L X 7w x 2 1/2 H

  6. #6

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    That's awesome that you built an amplifier , how would I get information on how to build my own amp ?

  7. #7

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    Quote Originally Posted by polkfarmboy View Post
    That's awesome that you built an amplifier , how would I get information on how to build my own amp ?
    Just go to Diyaudio.com. I am a member there too! you will learn a lot and in not time you will build your own amp. even Nelson Pass is there, you can build his amps too. I do not build his amps because they are class A and I do not like class A amps.
    I have build 6 amps so far. you need to know the basic in electronics like: read an ohmmeter, know how to solder and read a schematic and fallow instructions. you will get all the help you need there to build your first diy amp.
    Last edited by lanchile; 11-12-2011 at 03:31 PM.

  8. #8

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    Quote Originally Posted by polkfarmboy View Post
    how would I get information on how to build my own amp ?
    Uh oh!

  9. #9

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    Quote Originally Posted by Keiko View Post
    Uh oh!
    hahahahaha. come on!!! He can do it too... and you too!!!

  10. #10
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    Very good looking amp; very clean.

  11. #11

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    Thank you zingo!

  12. #12

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    Quote Originally Posted by Keiko View Post
    Uh oh!
    Are you thinking what I'm thinking?

    This could cascade from broken binding posts, closet doors and plasma screens to speakers on fire burning down an entire neighborhood. (or would that be barn?)
    VTL ST50 w/mods/RCA6L6GC/TlfnknECC801S
    CJPV-5 w/mods
    TT CJ Sonographe SG3 Oak/Sumiko LMT/Grado Wood Plat/Sumiko PIB2/The Clamp
    Musical Fidelity A1 CDPro
    Tuners w/mods Kenwood KT5020/Fisher KM60
    MF x-DAC V8, HAInfo NG27
    Herbies Ti-9/Vibrapods/MIT Shtgn AC1 IEC's/MIT Shotgun 2 IC's/MIT Shtgn 2 Speaker
    PSAudio Cryo PwrPrt Prem/ExctPwrEP15A
    Wlnt SDA 2B TL/Oak SDA SRS II TL-Sonicaps/Mills/Cardas/Cust SDA ICs/Mortite/Dynamat Extreme/TFLF Rings/FSB-2 Spikes
    NAD SS rigs w/mods
    GIK panels

  13. #13

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    hahahahahahaha that is the hard way to learn. But it is very, very, very dangerous to play with high voltages, especially with a huge capacitance in power supply.

  14. #14

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    Quote Originally Posted by inspiredsports View Post
    Are you thinking what I'm thinking?
    That the Mayans were right about 2012?

    pfb destroys the earth.

  15. #15

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    Today was the last adjustments in my integrated amp. I was able to bring down the offset to steady 00.6mv in each channel.
    so far I am very happy with sound.

  16. #16

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    Quote Originally Posted by inspiredsports View Post
    Are you thinking what I'm thinking?
    Makeover?

  17. #17

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    Nice work man!

    Transport: Oppo BDP-103/USB HDD (flac)
    DAC/Preamp: Benchmark DAC/PRE
    Power Amp: Parasound HCA-1500A
    Speakers: Harbeth Compact 7ES-3 Monitor
    Cables: Kimber Hero/8TC; DH Labs D-75

  18. #18

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    Quote Originally Posted by steveinaz View Post
    Nice work man!
    Thanks steveinaz! it took me sometime, but at the end it was all good.

  19. #19

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    I had to put heat sinks on the sides, now the amp runs way cooler than before and I can push it really hard without getting as hot as before.it sound wonderful. it was a big plus. I wanted to build it as small as I could but powerfull at the same time.Attachment 63091

  20. #20

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    Very nice integrated amp sir! I just joined DIY, lots of cool things to do over there, but building an amp of your own is awesome......Cheers

  21. #21

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    Is there are right up, parts list, or schematic that you used to build this amp?

    It looks really interesting, right at the level of amp I want to build. Thanks

  22. #22

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    Quote Originally Posted by Soverign View Post
    Very nice integrated amp sir! I just joined DIY, lots of cool things to do over there, but building an amp of your own is awesome......Cheers
    I am a member from Diyaudio.com for many years. I have build many integrated amps, even from Nelson Pass (class A). it feels really good to know that I can "CHOOSE" the quality in the parts I put in my amps. I have had so many good comercial amps like Bryston. The sound is awsome.
    "These are some specifications on the amp"


    Dual symmetrical differential power amplifier:

    Direct Signal Purist Concept. it uses 2 pairs 2SK1058/J162
    per channel produced by Renesas designed specifically for audio
    application. Unlike conventional amplifier, it only require 2 stage
    signal amplification to drive these mosfets, hence very natural sounding.
    You can feel the drum sticks hitting the cymbals and the piano hammer
    hitting the strings'


    130watts RMS 8ohms
    250watts RMS 4ohms
    THD : 0.008% (20 Hz : 20 kHz, 8 ohms)
    Frequency Response 4 Hz - 100 kHz
    Damping Factor (20-20K Hz, 8 ohms) : 500
    Signal to Noise Ratio : 120 dB 'A' weighted
    Input Impedance/Sensitivity : 33K / 1V

    Total dead silent at idle, absolutely no hiss or hum at full ear contact with tweeter and woofer at gain of 40X (32dB)
    and an input Sensitivity of 1V for rated output of 130watts RMS 8ohms


    Complete silence, No thump or noise during turn on/off . (No relay, Direct output)

    it has two pairs of balanced input differential..This will ensure accurate imaging of every instrument
    and vocals at complex and high energy passages.

    Very Low noise selected components throughtout.



    Very high quality double sided PCB, gold plated solder pads. ISO certified
    Output devices : genuine 2 pairs Renesas 2SK1058/J162
    Low noise and low capacitance audio drivers/transistors throughout
    Low ESR capacitors
    High Quality sealed variable resistors
    low noise audio resistors

  23. #23

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    Quote Originally Posted by Buddyboy1 View Post
    Is there are right up, parts list, or schematic that you used to build this amp?

    It looks really interesting, right at the level of amp I want to build. Thanks
    Just join the diyaudio.com club! you will find a lot of schematics, kits etc,etc. you will meet Nelson Pass there too.
    From the all known "Gainclones" to Nelson Pass class A amps!!!
    you can build amps point to point, make your own boards or buy the boards already made.
    You can get all the help you will ever need to build you OWN amp. Most of these diy amps can and will outperform commercial amps costing $2.000 USD and up!!!. Do not believe me?. Just go there and find out for yourself. is it difficult? not really! just need to know the "basic" in electronics like: how to read and use a multimeter, how to solder, fallow instructions on schematics, know electronic parts like: capacitors, resistors, inductors, diodes, transistors, transformer etc,etc... and all their functions. after this, you will NEVER buy a commercial amp anymore!!!. BUILD IT YOUR WAY.

  24. #24

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    well I was just wondering if you based your amplifier off of a specific design or if you just built it completely on your own.

  25. #25

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    Quote Originally Posted by Buddyboy1 View Post
    well I was just wondering if you based your amplifier off of a specific design or if you just built it completely on your own.
    Well, I build it using boards already made, but you can do it point to point too ( a lot of wires).you can pick a schematic of a design. Diyaudio has a lot of of them like: many from Nelson Pass, Krell clones, Gainclones, and many more.also you will find a lot of modifications and improvements in commercial amps.

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